From 37ba0ad81e439dbc3d6cd84d379d719c0974221b Mon Sep 17 00:00:00 2001
From: lucemia <lucemia@gmail.com>
Date: Wed, 15 Jan 2025 07:49:39 +0000
Subject: [PATCH] fix #423, add a test case for anullsrc as input

---
 .../test_input/test_input_with_filter.json             | 10 ++++++++++
 src/ffmpeg/dag/io/tests/test_input.py                  |  6 ++++++
 2 files changed, 16 insertions(+)
 create mode 100644 src/ffmpeg/dag/io/tests/__snapshots__/test_input/test_input_with_filter.json

diff --git a/src/ffmpeg/dag/io/tests/__snapshots__/test_input/test_input_with_filter.json b/src/ffmpeg/dag/io/tests/__snapshots__/test_input/test_input_with_filter.json
new file mode 100644
index 00000000..f2345b2f
--- /dev/null
+++ b/src/ffmpeg/dag/io/tests/__snapshots__/test_input/test_input_with_filter.json
@@ -0,0 +1,10 @@
+[
+  "ffmpeg",
+  "-f",
+  "lavfi",
+  "-t",
+  "10",
+  "-i",
+  "anullsrc",
+  "output.mp4"
+]
diff --git a/src/ffmpeg/dag/io/tests/test_input.py b/src/ffmpeg/dag/io/tests/test_input.py
index cf9700de..684c98c4 100644
--- a/src/ffmpeg/dag/io/tests/test_input.py
+++ b/src/ffmpeg/dag/io/tests/test_input.py
@@ -11,3 +11,9 @@ def test_input(snapshot: SnapshotAssertion) -> None:
         .output(filename="output.mp4")
         .compile()
     )
+
+
+def test_input_with_filter(snapshot: SnapshotAssertion) -> None:
+    assert input("anullsrc", f="lavfi", t=10).output(filename="output.mp4").compile() == snapshot(
+        extension_class=JSONSnapshotExtension
+    )